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Tap water quality report

Walpole, MA

EPA monitoring detected 24 contaminants across the 1 water supplier serving Walpole. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
24,070
people served
24
contaminants found
Massachusetts rankings Lead in Massachusetts PFAS in Massachusetts

What was found in Walpole's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
949 µg/L 9.5%
of the EPA limit 10000 µg/L
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Fluoride
944 µg/L 24%
of the EPA limit 4000 µg/L
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
TTHM
71.13 µg/L 89%
of the EPA limit 80 µg/L
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Chloroform
56.5 µg/L
No EPA limit set
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
44.625 µg/L 74%
of the EPA limit 60 µg/L
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Dichloroacetic Acid
23.7 µg/L
No EPA limit set
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Trichloroacetic Acid
23 µg/L
No EPA limit set
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Copper
13.4 µg/L 1%
of the EPA limit 1300 µg/L
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Bromodichloromethane
13 µg/L
No EPA limit set
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Barium
11.75 µg/L 0.6%
of the EPA limit 2000 µg/L
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Dibromochloromethane
4.8 µg/L
No EPA limit set
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Monochloroacetic Acid
3.175 µg/L
No EPA limit set
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Dibromoacetic Acid
2.6 µg/L
No EPA limit set
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Bromoform
0.9165 µg/L
No EPA limit set
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Carbon Tetrachloride
0.8000 µg/L 16%
of the EPA limit 5 µg/L
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Simazine
0.1735 µg/L 4.3%
of the EPA limit 4 µg/L
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Hexachlorocyclopentadiene
0.1500 µg/L 0.3%
of the EPA limit 50 µg/L
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2019
1/1 SYR4
Pfba
0.0160 µg/L
No EPA limit set
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2024
1/1 UCMR-5
Pfpea
0.0120 µg/L
No EPA limit set
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2024
1/1 UCMR-5
Pfhxa
0.0070 µg/L
No EPA limit set
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2024
1/1 UCMR-5
PFOA
0.0040 µg/L
No EPA limit set
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2024
1/1 UCMR-5
PFOS
0.0040 µg/L
No EPA limit set
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2024
1/1 UCMR-5
Pfhpa
0.0030 µg/L
No EPA limit set
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2024
1/1 UCMR-5
Lead
0.0018 mg/L 12%
of the EPA limit 0.0150 mg/L
Main supplier: WALPOLE WATER DEPT · 24,070 people · 2024
1/1 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Walpole

SupplierPopulation served
WALPOLE WATER DEPT 24,070

Frequently asked questions about Walpole tap water

Is Walpole tap water safe to drink?

EPA testing detected 24 contaminants in the water serving Walpole. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Walpole?

1 public water supplier report drinking-water monitoring for Walpole, Massachusetts to the EPA. Each is listed above with its population served.

What contaminants are in Walpole's water?

The contaminants EPA monitoring detected in Walpole include Nitrate, Fluoride, TTHM, Chloroform, Total Haloacetic Acids (HAA5). The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.